MMX Dual Differential Mount for G8X BMW M2 / M3 / M4
The MMX G8X M2 M3 M4 Dual Differential Mount adds the second support point BMW left off the differential assembly. Under hard acceleration, aggressive cornering, and track use, the factory mounting system allows unwanted differential movement, costing traction, blurring driver feedback, and promoting the diff and CV seal weeping common to hard-driven G8X cars. This CNC-machined billet mount uses the factory secondary mounting location to lock the differential down, sharpening power delivery and driveline response on both road and track.
Features
- Adds a critical secondary mounting point using the factory location, no cutting, drilling, or permanent modification
- Reduces differential deflection for more consistent traction and crisper driveline response
- Helps prevent differential and CV seal weeping caused by excessive movement
- CNC-machined from 6061-T6 billet aluminum, strong and lightweight
- Retains the factory differential sump, no fluid removal required during installation
- Compatible with OEM rubber bushing (33 31 6 899 168), polyurethane, or solid bush options
- Fully reversible installation
- 1-year manufacturer warranty against defects in materials and workmanship
G8X M2 M3 M4 Dual Differential Mount Specifications
- Material: CNC-machined 6061-T6 billet aluminum
- Mounting: Factory secondary mounting location, OEM-based fitment
- Bushing compatibility: OEM rubber (33 31 6 899 168), polyurethane, or solid
- Installation: Fully reversible, no fluid removal required
Applications
- BMW M2: G87 | 2023 to present
- BMW M3: G80, G81 | 2021 to present
- BMW M4: G82, G83 | 2021 to present
Notes
Frequently Asked Questions
What problem does this solve?
The factory differential mounting allows movement under high load, which hurts traction consistency and promotes diff and CV seal weeping. The G8X M2 M3 M4 Dual Differential Mount adds a second support point that locks the assembly down.
Do I need to drop the differential fluid to install it?
No, the mount retains the factory sump and installs without fluid removal.
What bushing should I use?
The mount accepts the OEM rubber bushing (33 31 6 899 168) for comfort, or polyurethane / solid options for maximum control. The bushing is required and sold separately.
Will it make the car harsher on the street?
With the OEM rubber bushing, NVH stays close to stock while still gaining stability. Stiffer bushings trade some comfort for sharper response.
Is it reversible?
Yes, fitment is fully OEM-based and the car can be returned to stock at any time.
Does it work with the MMX differential sump?
Yes, the two are designed to integrate cleanly with no additional hardware.
About MMX Performance
MMX Performance is a UK-based specialist in performance parts for BMW and MINI vehicles, crafting high-quality upgrades that blend precision engineering, rigorous testing, and motorsport heritage. Driven by enthusiast culture, MMX designs its products in the UK, often putting them through track validation, to ensure durability, fitment accuracy, and on-road performance. Their catalog spans drivetrain components, spacers, hardware, and chassis enhancements, all tailored to elevate both the driving experience and visual appeal of BMW and MINI models.
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